搜索结果: 1-15 共查到“地球物理学 attenuation”相关记录15条 . 查询时间(0.048 秒)
A review of nonparametric attenuation functions computed for different regions of Italy
Seismic attenuation S waves non-parametric inversio acceleration spectra
2015/10/8
We used a set of previously published nonparametric attenuation functions to calculate average functions for the Italian region. These nonparametric functions describe the spectral amplitude decay of ...
An attenuation study in Southern Italy using local and regional earthquakes recorded by seismic network of Basilicata
seismic attenuation Southern Italy Q
2015/9/15
We determined a set of empirical functions that describe the spectral amplitude decay of S-waves with distance in Southern Italy. We analyzed 32 earthquakes with magnitudes ML 2.0-5.4 and hypocentral ...
Bayesian analysisof a probability distribution for local intensity attenuation
Beta distribution binomial distribution power law random intensity decay validation
2015/9/15
Intensity attenuation and its variation as a function of the distance and earthquake size is still a critical issue in evaluating seismic hazard. We present a method that allows us to incorporate addi...
The attenuation of seismic intensity in the Etna region and comparison with other Italian volcanic districts
macroseismic intensity attenuation Mt. Etna Italian volcanic areas
2015/9/8
A detailed analysis of the intensity attenuation in the Etna and other Italian volcanic districts, was performed using the most recent and complete intensity datasets. Attenuation laws were derived th...
The intensity attenuation of Colfiorito and other strong earthquakes:the viewpoint of forecasters and data gatherers
Attenuation Forecast Macroseismic intensity Seismic scenario Validation criteria
2015/9/1
This article has been originated by thoughts on previous analyses related to the proba- bilistic treatment of the macroseismic attenuation, from which it turns out that in Italian territory the intens...
In several recent reports, we have explained the frequency dependence of the apparent seismic quality-factor (Q) observed in many studies according to the effects of geometrical attenuation, which was...
Attenuation of electromagnetic waves at the frequency ~1.7 kHz in the upper ionosphere observed by the DEMETER satellite in the vicinity of earthquakes
Waves and wave analysis Wave propagation
2015/8/24
The DEMETER satellite was the first satellite specifically dedicated to the recording of electromagnetic phenomena connected with seismic activity. Almost 6.5 years of measurements provide good opport...
Frequency dependent attenuation of seismic waves for Delhi and surrounding area, India
Delhi and surrounding area seismic waves
2015/8/17
The attenuation properties of Delhi and surrounding region have been
investigated using 62 local earthquakes recorded at nine stations. The frequency
dependent quality factors Qa (using P-waves) and...
Frequency dependent attenuation of seismic waves for Delhi and surrounding area, India
Coda Intrinsic Scattering Attenuation Frequency
2015/8/14
The attenuation properties of Delhi & surrounding region have been investigated using 62 local earthquakes recorded at nine stations. The frequency dependent quality factors Qa (using P-waves) and Qb ...
Evidence of magma activation beneath the Harrat Lunayyir basaltic field (Saudi Arabia) from attenuation tomography
Seismic attenuation model and the earth's crust Cenozoic basalt the earthquake happened S wave seismograms damping structure
2015/1/6
We present a seismic attenuation model for the crust beneath the Cenozoic basaltic field of Harrat Lunayyir (western Saudi Arabia), where a strong seismic swarm occurred in 2009. The tomography invers...
Acoustic ray tracing in the atmosphere: with gravitational effect and attenuation considered
Acoustic ray tracing Dissipative dispersion relation Gravity effect Attenuation
2015/8/18
An acoustic ray tracing model is developed to take into account the impacts of gravitational field and realistic atmospheric attenuation. Ray tracing equations are deduced from the real part of the di...
Structure of central and southern Mexico from velocity and attenuation tomography
Structure of central and southern Mexico velocity attenuation tomography
2014/4/10
The 3DVp, Vp/Vs, P- and S-wave attenuation structure of the Cocos subduction zone in Mexico is imaged using earthquakes recorded by two temporary seismic arrays and local stations. Direct P wave arriv...
Short-term prediction of rain attenuation level and volatility in Earth-to-Satellite links at EHF band
Short-term prediction rain attenuation level Earth-to-Satellite links EHF band
2009/11/2
This paper shows how nonlinear models originally developed in the finance field can be used to predict rain attenuation level and volatility in Earth-to-Satellite links operating at the Extremely High...
Influence of the Depth-Dependence of the PAR Diffuse Attenuation Coefficient on the Computation of Downward Irradiance in Different Water Bodies
underwater irradiance diffuse attenuation coefficient of light lake optics
2009/6/10
Three methods of determination of underwater irradiance in PAR region of the spectrum are considered:(1) measurements in situ (alternative possibility is theoretical calculations using spectral values...
Seismic attenuation structure in central Mexico: Image of a focused high-attenuation zone in the mantle wedge
Seismic attenuation structure central Mexico Image of a focused high-attenuation zone the mantle wedge
2014/4/10
Velocity spectra from moderate-sized earthquakes were used to investigate the P wave attenuation structure in central Mexico. In particular, we included regional events with magnitudes in the range of...